name: Proposals
description: New external API or other notable changes
title: "proposal: import/path: proposal title"
labels: ["Proposal"]
body:
  - type: markdown
    attributes:
      value: "Our proposal process is documented here: https://go.dev/s/proposal-process"
  - type: textarea
    id: proposal-details
    attributes:
      label: "Proposal Details"
      description: "Please provide the details of your proposal here."
    validations:

// Copyright 2021 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build compiler_bootstrap

package main

import (
	"go/ast"
	"go/token"
)

func (f *File) walkUnexpected(x interface{}, context astContext, visit func(*File, interface{}, astContext)) {
	error_(token.NoPos, "unexpected type %T in walk", x)
	panic("unexpected type")
}

// Copyright 2019 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package cgotest

import (
	"io"
	"os"
	"path/filepath"
	"strings"
)

// OverlayDir makes a minimal-overhead copy of srcRoot in which new files may be added.
func OverlayDir(dstRoot, srcRoot string) error {
	dstRoot = filepath.Clean(dstRoot)

// Copyright 2017 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package main

import (
	"flag"
	"fmt"
	"log"
	"os"
	"strings"

	"cmd/internal/buildid"
)

func usage() {
	fmt.Fprintf(os.Stderr, "usage: go tool buildid [-w] file\n")
	flag.PrintDefaults()
	os.Exit(2)
}

var wflag = flag.Bool("w", false, "write build ID")

func jumpArm(word string) bool {
	return armJump[word]
}

// IsARMCMP reports whether the op (as defined by an arm.A* constant) is
// one of the comparison instructions that require special handling.
func IsARMCMP(op obj.As) bool {
	switch op {
	case arm.ACMN, arm.ACMP, arm.ATEQ, arm.ATST:
		return true
	}
	return false
}

// IsARMSTREX reports whether the op (as defined by an arm.A* constant) is

// Test that we have no more than one build ID.  In the past we used
// to generate a separate build ID for each package using cgo, and the
// linker concatenated them all.  We don't want that--we only want
// one.

import (
	"bytes"
	"debug/elf"
	"os"
	"testing"
)

func testBuildID(t *testing.T) {
	f, err := elf.Open("/proc/self/exe")
	if err != nil {
		if os.IsNotExist(err) {
			t.Skip("no /proc/self/exe")
		}

// Copyright 2021 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package tar

import (
	"bytes"
	"io"
	"testing"
)

func FuzzReader(f *testing.F) {
	b := bytes.NewBuffer(nil)
	w := NewWriter(b)

// with the core of the assembler.

package arch

import (
	"cmd/internal/obj"
	"cmd/internal/obj/loong64"
)

func jumpLoong64(word string) bool {
	switch word {
	case "BEQ", "BFPF", "BFPT", "BLTZ", "BGEZ", "BLEZ", "BGTZ", "BLT", "BLTU", "JIRL", "BNE", "BGE", "BGEU", "JMP", "JAL", "CALL":
		return true
	}
	return false
}

// IsLoong64CMP reports whether the op (as defined by an loong64.A* constant) is

// Copyright 2019 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build linux && cgo

package cgotest

import (
	"fmt"
	"internal/testenv"
	"os"
	"runtime"
	"sort"
	"strings"
	"syscall"
	"testing"
)

// #include <stdio.h>
// #include <stdlib.h>
// #include <pthread.h>
// #include <unistd.h>

// Copyright 2010 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package zip

import (
	"compress/flate"
	"errors"
	"io"
	"sync"
)

// A Compressor returns a new compressing writer, writing to w.
// The WriteCloser's Close method must be used to flush pending data to w.
// The Compressor itself must be safe to invoke from multiple goroutines